Question

10. If 2a3 + 5 = 15, then the value of 'a' is
a) –15 b) 15
c)-20 d) None of these
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Answer 1

Step-by-step explanation:

hey 2a3 ??

3 is power of a or in multiply can't understand your question

if the question is this: 2a / 3 +5 = 15

2a + 15 / 3 = 15

2a + 15 = 45

2a = 45 - 15

2a = 30

a = 30 / 2

a = 15 is the answer

Answer 2

Answer:

3 is a power of a,many people make the mistake of not putting the power sign

2a^3 + 5 = 15

2a ^3 = 15 - 5

2a^3 = 10

a^3 = 10/2

a^3 = 5

a = cube root 5

Hence the answer is option d: None Of These

Step-by-step explanation:

Have a nice day dear :)